Silencer for combustion-engines of submarines.



WI. F. HAY & F. GUHRAUER.

SILENCER Foa coMusTloN ENGINES 0F SUBMARINES.

APPLlCATlON FILED SEPT. 10, 1915.

' lowing to be a full, clear,

MARLEY DOTHERINGHAM HAY AND FERDINAND GUHRAUED, oF THE HAefuE, NETHERLANDS.

SILENCER FOR COMBUSTION-ENGIN ES 0F SUBMRINES.

Specification oi Letters Eatent.

Patented-Feb.. 2U, 1917.

Application filed September 10, 1915. Serial No. 50,070.

To all whom z't may concern.

Be it known that we, MARLEY Formen- INGHAM HAY, a subject of the King of England, residing at Carel van Bylandtlaan 4, The Hague, Netherlands, and FERDINAND GUHRAUDR, a subject of the Emperor of Austria-Hungary, residing at Celebesstraat 49", The Hague, Netherlands, have invented certain new and useful Improvements 1n Silencers for Combustion-Engines of Submarines; and we do hereby declare the foland exact description of the invention, s'uch as' will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved silencer for the combustion engines of submarines, by the use of which the noise caused by the escape of the exhaust gases. is efiiciently silenced without the productlon of any appreciable resistance in the exhaust pipe, means being also provided in connection with the device for preventlng the entrance of sea water through the exhaust pipe into the engine, when the boat is submerged.

The principal feature of the silencer constructed according to this invention lies in the fact that an automatic valve is provided in the exhaust pipe, which valve opens by the pressure of the exhaust gases, and which has a hollow spindle connected by suitable piping with a water supply. The hollow spindle of the valve is provided with a number of small holes through which water canbe sprayed into the space above the valve. Small holes are also arranged around the valve seating, through which `water can be sprayed in such a way that the jets thus produced meet the jets issuing from the small holes in the valve spindle at a certain angle. f

The invention is illustrated on the accompanying drawing.

To the hull 1 of the boat is attached by meansof a iange 2, a valve chamber 3 connected at one end with the inboard exhaust pipe 4 and at the other end with the outboard continuation 5 of the said exhaust p ghe lower portion of the valve chamber 3 is provided with a cooling jacket 6. 7 is a valve located at the lower portion of the said chamber, which valve can be operated by hand. This valve is Water-cooled in the ordinary way and is kept open while the engine is working. When the boat is submerged this valve is closed for greater security and in order to'prevent the entry of v hollow, and its upper end through an openlng in the upper porti'onv 11 -of the casing, the open end of the valve spindle being in direct connection with a separate chamber 12, adjacent to the valve chamber 3 the 4chamber 12 being connected by means of a pipe 13 to the supply of cooling water.

14 are small holes provided in the wall of the hollow valve spindle l0, so arranged that the water passing. through the pipe 13, the chamber 12 and the spindle l0, is sprayed into the space in the valve chamber 3 above the valve 8.

.Below the seating of the valve 8 is proylded a passage which is formed in the casing and connected by means of the pipe 16 with a pipe for supplying cooling water. 17 are small holes or perforations provided in the wall 15 and opening into the space in the chamber 3 above the valve 8.

The spring 9 ofthe valve 8 serves to bring such valve back upon its seating when the engine stops. It also water, when the boat is submerged by closing the valve as explained and holding the same closed, aisted by the pressure of the water so that the water cannot reach the interior of the boat'. When the engine is running the cooling water circulates at a certain pressure, which is sufficient to keep the valve closed during the time that no exhaust gases are escaping.

The small holes 14 in the valve spindle 10 are so arranged that a fine spray is produced in the space above the valve 8 which spray becomes heavier from the moment the valve 8 is opened by the exhaust gases owing to the fact that this action causes an increase of pressure upon the water in the hollow valve spindle, which as will be understood, increases the velocity of flow and consequently the amount of water sprayedinto the exhaust gases.

At the same time ine jets of water are ejected from the holes 17 in the wall 15,

Works prevents the entry of Y which meet the jets issuing from the holes l the'water, so that the steam proceeding from above the valve 8 is condensed by and absorbed into the sea water, the visibility of the submarine at the surface of the water being decreased to an important degree.

What we .claim and desire to secure by Letters Patent of. the United States of America is 1. An exhaust silencer for the combustion engines of submarines, comprising in combination a valve, located in the exhaust pipe, a seat upon which said valve is adapted to normally rest, a spring adapted to retain the valve in seated position, but being sufticiently weak to allow the unseating of the valve due to the pressure of the exhaust gases 'during the exhaust stroke, said valve being formed with .a hollow spindle, means for supplying water to the interior of said hollow spindle, such spindle being formed with perforationsl extending through the walls thereof and opening into the space above the valve.

2. An exhaust silencer for the combustion engines of submarines comprising a valve located in the exhaust pipe, adapted to open through the pressure of the exhaust gases during the exhaust stroke, a hollow spindle to said valve, means for supplying water to the interior of'said hollow spindle, perforations passing through the walls of said spindle and opening into the space above the valve, a passage formed in the casing below the valve seating, means for connecting the said passage with a supply of water, perorations opening from the said passage into the space above the valve, and in such a way that the jets issuing from the, last mentioned perforations 4meet the jets issuing from the lperforations in the hollow spindle of the valve.

3.' An exhaust silencer for the combustion engines of submarines, comprising a valve chamber located in the exhaust pipe, a valve adapted to open through the pressure of the exhaust gases during the exhaust stroke, said valvel .being kept normally upon its seating in said chamber by a weak spring, a hollow spindle to said valve and havingan open end, perforations formed through the wall of said spindle, and opening into' the space in the valve chamber above the valve, another chamber formed at the top of the valve chamber, an opening between the said chambers, the open end of the hollow valve spindle being adapted to project therethrough, means for supplying water to the interior of the chamber containing the open end of the spindle, the water being adapted to be sprayed out through the erforations formed in the wall of said spind e, said spindle being adapted to be reciprocated within the upper chamber whereby it acts as a pump to forcethe water contained in the said chamber through the perforations causing the jets of water to be projected with greater intensity at the instant of the passing ofthe exhaust gases.

4. An exhaust silencer for the combustion engines of submarines, comprising a valve chamber located in the exhaust pipe, a valve adapted to open through the pressure of the exhaust `gases during the exhaust stroke, said valve being kept normally upon its seating in said chamber by a weak spring a hollow spindle to said valve, perforationspassing through the wall of said spindle and opening into the space in the valve chamber above the valve, another chamber at the top of the valve chamber," an opening between the said chambers through which the open end of the hollow valve spindle works, means for supplying water to the interior of the chamber containing the open end of the spindle, a passage formed in the casing below the valve seating, means for connect.

ing the said passage with a supply of water and perforations opening from the said passage into the space in the valve chamber above the valve, in such a wa that the jets issuing from these last mentloned perforations meet the jets issuing from the perforations in the hollow spindle of the valve at an angle, substantially as described.

In testimony whereof we affix our signatures.

MARLEY FOTHERINGHAM HAY. FERDINAND GUHRAUER. 

